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In this video I am comparing the strength of Ferrite magnets (found in Microwave Magnetron Valves) and Neodymium Magnets, made from rare earths. The video is only intended to guide home manufacturers of Wind Generators, so that they can choose the magnets for their project, whether more amateur or more professional, in the search for greater results in the construction of a good generator. I would like to thank the valuable friends of the Renewable Resources Group on Whatsapp, where we exchange ideas at a national level. A big hug to all.